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They are fairly cheap, easy to maintain, reliable, safe and small.
Since these engines burn fuel, they have long ranges but pollute the environment.
) is a mobile machine that transports people or cargo.
Typical vehicles include wagons, bicycles, motor vehicles (motorcycles, cars, trucks, buses), railed vehicles (trains, trams), watercraft (ships, boats), aircraft and spacecraft.
On the other hand, batteries have low energy densities, short service life, poor performance at extreme temperatures, long charging times, and difficulties with disposal (although they can usually be recycled).
Like fuel, batteries store chemical energy and can cause burns and poisoning in event of an accident.
Fuel cells are similar to batteries in that they convert from chemical to electrical energy, but have their own advantages and disadvantages.
Electrified rails and overhead cables are a common source of electrical energy on subways, railways, trams, and trolleybuses.
Aircraft flying in the jet stream may get a boost from high altitude winds.
however, this incurs additional hardware costs and may be impractical for larger batteries.
Moreover, there must be standard batteries for battery swapping to work at a gas station.
Compressed gas is currently an experimental method of storing energy.
In this case, compressed gas is simply stored in a tank and released when necessary.